Specification: - Tool diameter: 2mm / 3mm / 4mm / 5mm / 6mm /8mm /10mm/12mm /14mm. - It can be used for 9 kinds of bearings size. - Easy and fast to dismantle and install bearings. - Durable and practical. - Material: Aluminum alloy - Usage: Bearing disassembly - Use for HSP Tamiya HPI Kyosho RC Car /RC Helicopter etc.